征兆的用法和样例：
例句
-
这次暴动可看作是政治上不稳定的征兆。
The riot can be considered a symptom of political instability. -
预告，为 ... 的征兆预示着重大事情或灾难性事情即将发生的预兆；预告
An indication of something important or calamitous about to occur; an omen. -
有刮台风的征兆。
There was a threat of typhoon.
